assume cs:code
code segment
start: call anz
       mov ax,cs
	   mov ds,ax
	   mov si,offset do0
	   mov ax,0
	   mov es,ax
	   mov di,200h
	   mov cx,offset do0end-offset do0
	   cld
	   rep movsb
	   
	   mov ax,4c00h
	   int 21h

anz:   mov ax,0
	   mov es,ax
	   mov word ptr es:[0*4],200h
	   mov word ptr es:[0*4+2],0
	   ret

do0:   jmp short do0start
	   db "overflow!"
	   
do0start: mov ax,cs
		  mov ds,ax
		  mov si,202h
		  mov ax,0b800h
		  mov es,ax
		  mov di,12*160+36*2
		  
		  mov cx,9
s:		  mov al,[si]
		  mov es:[di],al
		  inc si
		  add di,2
		  loop s
		  
		  mov ax,4c00h
		  int 21h

do0end:   nop
code ends
end start